Fix External Hard Drive Not Initialized, I/O Device Error

Overview: external hard disk not initialized I/O error

The reasons for a hard drive or external hard drive showing "Unknown, Not Initialized" on your PC include a faulty or loose connection, a corrupted or missing driver, a hardware malfunction, a power issue, or a software problem. Additionally, the drive may not be recognized if it's not formatted in a compatible file system, or if it's not properly configured in the BIOS settings. Furthermore, a virus or malware infection can also cause the drive to be unrecognized.

Virus attack
Bad sectors
Partition Loss
File system corruption
Corrupted Master Boot Record (MBR)

Symptoms of the disk not initialized:

1. Disk shows as Unknown, Not Initialized with unallocated space.
2. Disk shows as Unknown, Not Initialized with no space displayed.

What's I/O error?

An I/O device error occurs when Windows is unable to perform input/output actions, such as reading or copying data, when accessing a drive or disk. It can affect various hardware devices or media.

To fix the 'Disk Unknown Not Initialized' error on an external hard disk, initialize the disk to GPT or MBR first, but be aware that some users may encounter a successive error message 'the request could not be performed because of an I/O device error' due to the initialization process.

disk unknown not initialized i/o error

When initializing a disk fails and you're caught up in the other unfamiliar I/O error, the solution can be found by troubleshooting the external hard disk not initialized I/O error. This involves checking the disk for physical damage, updating the disk's firmware, and ensuring the disk is properly connected to the computer. Additionally, running a disk check and scan can help identify and fix any issues. If the problem persists, it may be necessary to replace the disk.

Part 1. Recover data from external hard drive unknown not initialized I/O error

Initializing a disk won't damage data and cause data loss. It's safe to initialize a disk to a normal state when it shows as unknown and not initialized.

To initialize a hard disk in Windows Disk Management:

Step 1. Connect the uninitialized external hard drive, HDD or other storage devices to your PC.

Step 2. To open the Disk Management console, press the Windows key + R to bring up the Run dialog box, type "diskmgmt.msc" and press Enter.

open disk management in Run box

Step 3. To resolve the issue of an uninitialized, unknown external hard drive with an I/O device error, right-click on it and select the "Initialize Disk" option. This action will allow the system to recognize and utilize the external hard drive.

Step 4. Initialize the disk and set it as either Master Boot Record (MBR) or GUID Partition Table (GPT) in a single step.

initialize external hard drive to mbr or gpt to fix unknown not initialize error

However, this time is different. You cannot perform the manner of initializing a disk because of I/O error, so you must turn to other workarounds instead of the most approachable one, which could potentially lead to data loss. It's smart to recover data from the inaccessible external hard drive before heading to the troubleshooting in Part 2.

Deep Data Recovery is a renowned hard drive data recovery software that can recover all types of files, including pictures, raw images, and documents, from various storage devices, as long as the hard drive is detected by Windows. If the hard drive is not showing up in Disk Management, trying to make it visible.

Free Download
Windows 11/10/8/7, 100% Secure

To recover data from external hard drive with I/O error:

Step 1.Connect your external hard drive to your computer using a correct USB cable. Then, run Deep Data Recovery, select the desired file types, and click "Next" to begin the recovery process.

Select file types that you want to recover

Step 2.You will see your external disk listed under External drives in the next window. This software supports a wide range of external disk brands, including WD, Seagate, Toshiba, LaCie, SanDisk, Samsung, and more.

Select the external hard drive and then click the "Scan" button.

select your seagate external hard drive and click scan

Step 3. Once the scan process begins, the software will identify and display more lost and deleted data, organizing the recovered files and folders in a clear and easily accessible format. Users can quickly locate specific files by type or search for exact file names using the search box, making it simple to find the desired data.

Step 4. After scanning, you can preview the files found by Deep Data Recovery's algorithms, select the desired files, and click "Recover" to retrieve them. To prevent data overwriting, it's recommended to save the recovered data to a different drive than the original Seagate drive.

Part 2. Fix external hard drive not initialized with I/O device error

To resolve the external hard drive not initialized I/O error, try replacing the connection cable, repairing the Master Boot Record (MBR), using the DiskPart command, or removing any viruses from your computer or laptop.

To clean an external hard drive using DiskPart commands, follow these steps. However, please note that this process will erase all data on the uninitialized hard drive, so ensure you've recovered any important data before proceeding. If you haven't, refer to Part 1 to restore lost data.

To clean the external hard drive with DiskPart:

Step 1. Press Win+R > Type: diskpart and hit Enter.

Step 2. Type: list disk and hit Enter.

Step 3. The command select disk n should be used, where n is the drive letter of an uninitialized external hard drive, and then hit Enter.

Step 4. Type: clean and hit Enter.

Step 5. Type: convert gpt or convert mbr and hit Enter.

Step 6. Type: create partition primary and hit Enter.

Step 7. Type: format quick fs=ntfs and hit Enter.

Step 8. Type: assign and hit Enter.

Step 9. Type: exit and hit Enter.

If your external hard drive is not initializing due to an I/O error, you can try fixing it by running the following command lines: chkdsk /r, chkdsk /f, and chkdsk /x. Then, run the command line "chkdsk /r" again to check for any remaining issues.